%0 Journal Article
%T Exact Conservation Laws of the Gradient Expanded Kadanoff-Baym Equations
%A J. Knoll
%A Yu. B. Ivanov
%A D. N. Voskresensky
%J Physics
%D 2001
%I arXiv
%R 10.1006/aphy.2001.6185
%X It is shown that the Kadanoff-Baym equations at consistent first-order gradient approximation reveal exact rather than approximate conservation laws related to global symmetries of the system. The conserved currents and energy-momentum tensor coincide with corresponding Noether quantities in the local approximation. These exact conservations are valid, provided a Phi-derivable approximation is used to describe the system, and possible memory effects in the collision term are also consistently evaluated up to first-order gradients.
%U http://arxiv.org/abs/nucl-th/0102044v1